IS 14665-3-1 to 2: Electric Traction Lifts, Part 3: Safety Rules, Section 1: Passenger and Goods Lifts, Section 2: Service Lifts

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Jawaharlal Nehru
Step Out From the Old to the New

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PROTECTED BY COPYRIGHT

IS 14665 ( Part 3/Sec 1 & 2 ) : 2000

( Superseding IS 4666 : 1980 and IS 6383 : 1971 )

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Indian Standard
ELECTRIC TRACTION LIFTS

PART 3 SAFETY RULES

Section 1 Passenger and Goods Lifts

Section 2 Service Lifts

ICS 91.140.90

© BIS 2000

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

May 2000

Price Group 6

AMENDMENT NO. 2 SEPTEMBER 2012

TO

IS 14665 (PART 3/SEC 1) : 2000 ELECTRIC TRACTION

LIFTS

PART 3 SAFETY RULES

SECTION 1 PASSENGER AND GOODS LIFTS

(Page 2, clause 8) — Substitute the following for the existing clause:

'8. TERMINAL SLOW DOWN, NORMAL STOPPING AND FINAL
LIMIT SWITCHES

8.1 Terminal Slow Down and Normal Stopping Limit Switches

8.1.1 Every electric lift shall be provided with upper and lower
terminal slowdown and normal stopping limit switches arranged to
stop the car automatically within the limits of top car clearance and
bottom run by (over travel) from any speed attained in normal
operation as per Table 1 . Such limit switches shall act independently of
the operating device andthe final limit switches.

Table 1 Terminal Limit Switch Requirements for Elevators

(Clause 8.1.1)

SI. No.

Elevator

Control Type

Slow Down

Normal Stopping

Final Limit

Speed

Limit Switch

Limit Switch

Switch

m/s

(1)

(2)

(3)

(4)

(5)

(6)

ii)

in)

NOTE-

< 0.7 Single Speed (AC 1) Optional
<0.7 All except (AC 1) Required
>0.7 All except (AC 1) Required

— Not required if Slow down switch is monitored or

Required Required
Optional Required
Required Required
(see Note)

detected as per 8.1.5 and 8.1.6.

8.1.2 All slowdown and normal stopping Limit switches shall be either
electro mechanical, electronic, optical or magnetic type. In case of

Price Group 2

Amend No. 2 to IS 14665 (Part 3/Sec 1) : 2000

electromechanical limits switches, contacts of all terminal limit
switches shall be opened positively and mechanically by the movement
of the lift car. Electronic, optical or magnetic type terminal limit
switchesshall be in compliance with 8.1.5.

8.1.3 Terminal slow down and normal stopping limits switches may be
fitted in the lift car or in the lift well or in the machine room, and such
switches shall be brought into operation by the movement of the lift
car. If such switches are fitted on the car, then the trailing cables used
shall conform to 8.4.2.7 and 8.4.2.8 of IS 14665 (Part 2/Sec 1).

8.1.4 When terminal slow down and stopping limit switches are
situated in the machine room they shall be mounted on and operated by
the slow down and stopping device mechanically connected to and
driven by the lift car without dependence upon friction as a driving
means. An automatic safety switch shall be provided to stop the
machine should the tape, chain, rope or other similar device
mechanically connecting the stopping device to the car fail [see
IS 14665 (Part 4/Sec 4)].

8.1.5 If the terminal slowdown limit switches are of electronic, optical
or magnetic type, then a detection mechanism by means of software, to
ensure proper functioning of the limit switches, must be in place. Such
detection should take place automatically every time the elevator car
reached top or bottom terminal landings. In case of failure to detect
such limit switches, for proper functioning, the elevator shall be shut
down automatically. It shall not be possible to RESET this tripped
elevator without manual intervention by competent person.

8.1.6 In the event of having provided such detection mechanism for
terminal slow down switches, as per 8.1.5, normal terminal stopping
switches may not be required. '

(Page 2, clause 8.2) — Substitute the following for the existing clause:

Amend No. 2 to IS 14665 (Part 3/Sec 1) : 2000
'8.2 Final Limit Switches

8.2.1 Electric lifts shall, in all cases, be provided with final limit
switches arranged to stop the car automatically within the top and
bottom clearances independently of the normal operating device and
the terminal limit switches. The switches shall be so arranged so as to
open before the buffers are engaged.

8.2.2 Final limit switches shall act to prevent movement of the lift car
under power in both directions of travel and shall after operating
remain open until the lift car has been moved by a hand winding or by
Emergency Electrical Operation as defined in 9.5 of IS 14665 (Part
3/Sec 1) to a position within the limits of normal travel.

8.2.3 Final limit switches shall be mounted in the lift well or on the lift
car and shall be operated by the movement of the lift car in the lift
well. Trailing cables used shall conform to 8.4.2.7 and 8.4.2.8 of
IS 14665 (Part 2/Sec 1).

8.2.4 Final limit switches shall be electro-mechanical type. Contacts of
final limit switches shall be opened positively and mechanically by the
movement of the lift car.

8.2.5 Final limit switches shall not control the same devices on the
controllers as those controlled by the normal terminal limit switches
unless two or more separate and independent devices are provided, two
of which shall be closed to complete the motor and brake circuit in
each direction of travel. When the final limit switches control the same
device or devices on the controller as the operating device or the
terminal limit switches, they shall be connected in the control circuit
on the opposite side to the terminal limit switches.

8.2.6 Final limit switches designed to open the main circuit of the
motor may control the same device or devices on the controller as
those controlled by the terminal limit switches, but when such

Amend No. 2 to IS 14665 (Part 3/Sec 1) : 2000

final limit switches are employed on direct current power supplies,
they shall be provided with additional contacts to control the brake
circuits. All final limit switches shall be enclosed type and shall be
securely mounted. The contacts of all such switches shall be opened
positively and mechanically by the movement of the lift car. '

(Page 2, clauses 8.3, 8.4, 8.5, 8.6, 8.7 and 8.8) — Delete.

(Page 3, clause 9.4) — Add the following new clause 9.5 after 9.4:

'9.5 Emergency Electrical Operation

9.5.1 If the manual effort required tomove the car in the upward
direction with its rated load does not exceed 400 N, the machine shall
be provided with a manual means of emergency operation allowing the
car to be moved to a landing with the aid of smooth spoke less wheel.

9.5.2 It shall be easily possible to check from machine room whether
the car is in unlocking zone. The check may be made, for example, by
means of marks on the suspension media.

9.5.3 If the effort defined in 9.5.1 is greater than 400 N, alternatively,
a means of emergency electrical operation satisfying following
conditions may be provided on lift controller with available power
supply.

9.5.3.1 Operation of the emergency electrical operation switch shall
permit, from the machine room, the control of car movement by
constant pressure on buttons protected against accidental operation.
The direction of movement shall be clearly indicated;

9.5.3.2 After operation of the emergency electrical operation switch,
all movement of the car except that controlled by this switch shall be
prevented. The effects of the emergency electrical operation shall be
overridden by switching on the inspection operation;

Amend No. 2 to IS 14665 (Part 3/Sec 1) : 2000

9.5.3.3 The emergency electrical operation switch shall render
inoperative by itself or through another electrical switch following
electric devices:

a) Those mounted on the safety gear;

b) Those mounted on the over speed governor;

c) Final limit switches; and

d) Those mounted on the buffers.

9.5.3.3 The emergency electrical operation switch and its push buttons
shall be so placed that the machine can be readily observed when using
them;

9.5.3.4 The car speed shall not exceed 0.7 m/s.

(ETD 25)

Reprography Unit, BIS, New Delhi, India

AMENDMENT NO. 1 FEBRUARY 2011

TO

IS 14665 (PART 3/SEC 1) : 2000 ELECTRIC TRACTION

LIFTS

PART 3 SAFETY RULES

Section 1 Passenger and Goods Lifts

(Page 1, clause 6.1, first para) — Substitute the following for the existing

sentence:

'The net inside car areas for various passenger capacities with corresponding
minimum rated loads have been given in Table 1.'

(Page 1, clause 6.1) — Add the following new clause 6.2:

'6.2 Every passenger lift shall be provided with an overload device, which will
prevent the lift from starting in case the lift car is loaded to 1 10 percent of the
rated capacity of the lift or more. Lift shall remain stationery with door open.
Audio & visual warning device shall be provided to alert the passengers in case
of overload.'

(Page 2, Table 1) — Substitute the table given on page 2 for the existing

table.

(Page 3, clause 9.4) — Add the following new clause 9.5:

'9.5 Battery operated Automatic Rescue Device (ARD) shall be provided on all
lifts to take the lifts to the nearest possible landing in case of power failure. In
case of lifts equipped with back up generator with AMF (Automatic Mains
Failure) panel, the provision of ARD is optional. For all lifts with ARD, an
audio & visual indicator shall be provided inside the lift car to alert the person
trapped inside that he/she is being rescued. Capacity of battery shall be such
that minimum three rescue operations can be performed without recharging.'

Amend No. 1 to IS 14665 (Part3/Sec 1) : 2000

Maximum Net Inside Car
Area, m 2

(ET 25)

Reprography Unit, BIS, New Delhi, India

Lifts and Escalators Sectional Committee, ET 25

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Lifts and
Escalators Sectional Committee had been approved by the Electrotechnical Division Council.

The necessity of lifts in multi-storeyed buildings has been so well recognized that no multi-storeyed building is
planned without proper provision for lifts. The installation of lifts has been governed in cities by different Lifts Act
and Rules thereunder, which are intended to ensure safe installation and operation of the lifts. However, there is no
uniformity in these rules regarding minimum standards of installation which should be fulfilled for safe working of
lifts, and this standard is intended to give the necessary guidance for safe installation, operation and maintenance
of electric passenger, goods and service lifts.

This standard is one among the series of standards finalized by the Lifts and Escalators Sectional Committee as
detailed below. This was done with a view to align the Indian Standards with the latest developments in the field
of lifts and escalators and also to align the standards with the European Norms on Lifts and Escalators EN 81 .
Moreover, these standards are published with a view to have a uniform code for electric traction lifts all over the
country, where presently different rules are being followed by different states.

New IS Series
14665 Electric traction lifts :
Part 1 Outline dimensions

Part 2 Code of practice for installation,
operation and maintenance

Section 1 Passenger and goods lifts

Section 2 Service lifts

Part 3 Safety rules

Section 1 Passenger and goods lifts

Section 2 Service lifts

Part 4 Components

Section 1 Lift buffers

Section 2 Lift guide rails and guide shoes

Section 3 Lift carframe, car, counterweight
and suspension

Section 4 Lift safety gears and governors
Section 5 Lift retiring cam

Superseding IS

3534 : 1979 Outline dimensions of electric lifts {first
revision )

1860 : 1980 Code of practice for installation, operation
and maintenance of passenger and goods lifts
( first revision )

6620 : 1972 Code of practice for installation, operation
and maintenance of service lifts

4666 : 1980 Electric passenger and goods lifts
6383 : 1971 Electric service lifts

9803 : 1981 Buffers for electric passenger and goods lifts

10191 : 1982 Car and counterweight guide rails, guide rail
supports and fastenings for lifts; and

11615 : 1986 Car and counterweight guide shoes for
electric passenger and goods lifts

1 1 706 : 1 986 General requirements of carframe for electric
passengers and goods lifts

9878:1981 Safety gears and governors for electric
passenger and goods lifts

10448 : 1983 Retiring cam for passenger and goods lifts

( Continued on third cover )

IS 14665 ( Part 3/Sec 1 ) : 2000

Indian Standard
ELECTRIC TRACTION LIFTS

PART 3 SAFETY RULES
Section 1 Passenger and Goods Lifts

1 SCOPE

1.1 This standard ( Part 3/Sec 1 ) applies to the
construction and safety of new passenger and goods
lifts suspended by ropes and employing a guided lift
car.

1.2 This standard does not apply to platform lifts,
amusement devices, skip hoists, conveyors or similar
apparatus used for raising, piling or tiering.

2 REFERENCES

The following standards are necessary adjuncts to
this standard:

IS Ho. Title

10580 : 1983 Service conditions for elect-

rical equipment

12360 : 1988 Voltage bands for electrical

installations including

preferred voltages and
frequency

Electric traction lifts:

( Part 2/Sec 1 Part 2 Code of practice for

and 2) : 2000 installation, maintenance and

operation, Section 1 Passenger

and goods lifts; Section 2

Service lifts

Part 4 Components, Section 4
Lift safety gears and governors

14665

(Part4/Sec4):
2000

3 TERMINOLOGY

For the purpose of this standard, the definitions given
in IS 14665 ( Part 2/Sec 1 ) shall apply.

4 MATERIALS

All materials, fittings, appliances, etc, including
electronic equipment shall work satisfactorily under
normal operating conditions ( see IS 10580 and
IS 12360).

5 FACTOR OF SAFETY

The factor of safety for any part of the lift shall not be
less than five. Higher factor of safety for various parts
shall be applicable wherever specified in the relevant

parts and sections of this standard.

6 CAPACITY AND LOADING

6.1 Rated Load and Net Inside Car Area
Measurements

The minimum rated load of a passenger lift car
corresponding to the net inside car area shall bear
the relationship given in Fig. 1, the net inside car area
being evaluated as shown in Fig. 2. The net inside car
areas for certain selected values of minimum rated
loads have been given in Table 1 .

NOTES

1 The graph given in Fig. 1 is based on the following
formula :

W - 35.05 A* + 325.66 A

where

W = rated load in kg, and
A = net inside areas in m 2 .

2 For rated loads exceeding those covered by the graph,
values may be evaluated from the formula given in
Note 1.

3 To avoid the possibility of serious overloading of bed
lifts, it is recommended that such lifts should be treated
as passenger lifts.

4 The minimum rated load for goods lifts shall be based
on a load of not less than 3.45 kN/m 2 of the net inside
car area.

5 When the load in a goods lift consists of pallets, or
similar single piece loads loaded by means of a power
truck, it is necessary during loading and unloading to take
into account the total load on the car platform, the capacity
of the brake, and the resistance to slipping of the ropes
on the sheave of a traction machine. Similarly, guide
rails, guide fixings, car frame and platform shall be designed
to withstand the horizontal thrust imposed by power trucks,
motor vehicles and the like.

6 For motor vehicle and other special purpose lifts for
transportation of light weight and heavy volume loads,
the lift car inside dimensions mutually agreed between
manufacturer and purchaser will be permitted, with the
provision of a device to prevent the lift room starting
from a landing in case of overloading.

7 LOAD PLATE

7. 1 Load to be Marked in the Lift Ca r

A load plate giving the rated load of the lift shall be

IS 14665 { Part 3/Sec 1 ) : 2000

fitted in each lift car in a conspicuous position. For
passenger lifts, the rated load shall be given in number
of persons and kilograms. For goods lifts, the rated
load shall be given in kilograms or other convenient
units and in persons. For the purpose of this clause,
a person shall be regarded as weighing 68 kg.

12 3*5

NET INSIOE CAR AREAS IN m 2

Fig. I Minimum Rated Loads for
Passenger Lift Cars

Table 1 Maximum Net Car Areas for Various
Rated Loads

(Clause 6. \ )

Rated Load

Maximum Net Inside Car Area

kg

m 2

272

0.77

340

0.95

408

1.12

476

1.28

544

1.45

612

1.60

680

1.76

748

1.91

816

2.05

884

2.20

1 000

2.43

1 500

3.38

2 000

4.22

2 500

4.99

8 TERMINALSTOPPING AND FINAL LIMIT
SWITCHES

8.1 Every electric lift shall be provided with upper
and lower normal terminal limit switches arranged to
stop the car automatically within the limits of top car

clearance and bottom runby (overtravel ) from any
speed attained in normal operation. Such limit switches
shall act independently of the operating device, the
ultimate or final limit switches and the buffers.

8.2 Normal terminal limit switches may be fitted in
the lift car or in the lift well or in the machine room,
and such switches shall be brought into operation by
the movement of the lift car.

8.3 When terminal limit switches are situated in the
machine room, they shall be mounted on and operated
by stopping device mechanically connected to and
driven by the lift car without dependence upon friction
as a driving means. An automatic safety switch shall
be provided to stop the machine should the tape,
chain, rope or other similar device mechanically
connecting the stopping device to the car fail [ see
IS 1 4665 ( Part 4/Sec 4 ) : 2000 ].

Provided that when the floor controlling or selector
of an automatically operated lift is driven in accordance
with this requirement, the floor stopping contacts for
each terminal floor may serve as normal terminal floor
stopping devices.

8.4 Ultimate or Final Limit Switches

Electric lifts shall, in all cases, be provided with ultimate
or final limit switches arranged to stop the car
automatically within the top and bottom clearances
independently of the normal operating device and
the terminal limit switches. The switches and the oil
buffer shall be so arranged that the opening of the
switch and the engagement of the buffer shall be as
nearly simultaneous as is possible. When spring buffers
are employed, the switch shall open before the buffers
are engaged.

8.5 Ultimate or final limit switches shall act to prevent
movement of the lift car under power in both directions
of travel and shall, after operating, remain open until
the lift car has been moved by a hand winding to a
position within the limits of normal travel.

8.6 Ultimate or final limit switches shall not be mounted
on the lift car and shall be operated by the movement
of the lift car in the lift well.

8.7 Ultimate or final limit switches shall not control
the same switches on the controller as those controlled
by the normal terminal limit switches unless two or
more separate and independent switches are provided.
two of which shall be closed to complete the motor
and brake circuit in each direction of travel. When
the ultimate or final limit switches control the same
switch or switches on the controller as the operating
device or the terminal limit switches, they shall be
connected in the control circuit on the opposite side
to the terminal limit switches.

IS 14665 ( Part 3/Sec 1 ) : 2000

NET INS10E CAR AREA = A«8 NET INSIDE CAR AREA * AxB

Fig. 2 Net Inside Car Areas for Passenger Lifts

8.8 Ultimate limit switches designed to open the main
circuit of the motor may control the same switch or
switches on the controller as those controlled by the
terminal limit switches, but when such ultimate limit
switches are employed on direct current power supplies,
they shall be provided with additional contacts to
control the brake circuits. All ultimate or final limit
switches shall be of enclosed type and shall be securely
mounted. The contacts of all such switches shall be
opened positively and mechanically by the movement
of the lift car.

9 OPERATION

9.1 A manually operated mains disconnecting switch
shall be installed in the main circuit cables of electric
lift machines or motor generator sets. This switch
shall be placed close to and visible from the machine
or motor generator sets it controls.

9.1.1 When there are more than one lift machine in
machine room, each machine shall have a disconnecting
switch. These switches shall be numbered to correspond
to the number of the driving machine which they control
and they shall be conveniently situated with respect
to the driving machine they control.

9.2 Automatic (push button operated) lift shall conform
to the following requirements.

a) It shall not bepossible to start the lift car under
normal operation unless every landing door and
car door is in the closed position.

b) The landing push buttons shall be inoperative
during the whole time an occupied lift car is in
use. The landing push buttons shall remain
inoperative until the person or persons, using
the lift, have vacated the lift car and the landing
door has been again closed, except that with

the collective control, the push button may be
utilized for this purpose provided they do not
in any way interfere with the direction of current
journey and that provision shall be made for a
reasonable time lag between the stopping of
the lift car and its being restarted.

9.3 When the control and facilities for inspection are
fitted on top of car, it shall be so ensure that when in
use :

a) It is not possible to control the car from any
other position;

b) The car will travel only at a speed not exceeding
1 .0 m/s in case of drives with two speed motors
and dc motors;

c) The car shall not move until all safety devices
are in and remain in the safe position;

d) The car shall move only whilst the corresponding
button is subjected to continuous pressure;
and

e) An emergency switch with the positions marked
thus 'STOP' and 'RUN' ( or 'TEST SLOW' ),
shall be provided in this control station. When
the switch is in 'STOP' position it shall not be
possible to move the car.

9.4 An emergency stop switch may also be fitted dn
the top of every lift car for use by persons working
thereon.

10 LEVELLING ACCURACY

10.1 Every lift car under automatic attendant control
(other than car switch control) shall stop at landing
with car sill fairly in level with the landing sill. The
difference in levels shall not exceed the distances

IS 14665 ( Part 3/Sec 1 ) : 2000

indicated as :

Levelling Accuracy, Max

°a) Lifts up to speed of ±75 mm

0.65 m/s and capaci-
ties up(to 550 kg

2, b) Lifts upto speed of ±25 mm

1 .0 m/s and drives
with two speed motors
having a ratio of 1 : 4
between high speed
and low speed

c) Lifts with electronic ±12mm

motor control / ward
leonard control ( any
speed and any load )

11 TESTING

11.1 General

Sufficient tests and inspection shall be made during
manufacture of the lift components to ensure that they
comply with relevant standard.

11.2 High Voltage Test

The dielectric of electrical apparatus (excluding motors,
generators and instruments which are tested in
accordance with the appropriate Indian Standards
wherever they exist) shall be capable of withstanding
a test voltage often times the working voltage, with a
maximum of 2 000 V when applied :

a) between the live parts and case or frame with
all circuits completed,

b) between main terminals or equivalent parts
with all circuits open, and

c) between any live parts of independent circuits.

NOTE — Owing to the impracticability of applying test
(b) and (c) mentioned above on controllers and similar
apparatus after controller wiring has been completed, these
tests may be made at convenient stages of manufacture.

11.2.1 The method of apply ing the voltage shall be as
follows - .

11.2.1.1 Method of applying high voltage

The test shall be made with alternating voltage of any
convenient frequency, preferably between 40 Hz and
60 Hz. The test voltage shall be of approximately

For speeds higher than 0.65 m/s and loads higher than
550 kg the levelling accuracy will be wider.

2> Normally drives with two speed motors are not used for
speeds higher than 1 m/s. The maximum capacity to achieve
the accuracy also varies with the ratio of the high speed to low
speed in two speed motors.

sinewave form, and during the application of voltage,
the peak value, as would be determined by spark
gap by oscillograph or by any other approved method,
shall not be more than 1 .45 times the rms value. The
rms value of the applied voltage shall be measured
by means of a voltmeter used with a suitably calibrated
potential transformer or by means of a voltmeter
used in connection with a special calibrated voltmeter
winding or testing transformer, or by any other suitable
voltmeter connected to the output side of the testing
transformer.

1 1.2. 1 .2 Duration of high voltage test

The test shall be commenced at a voltage of about
one-third of the test voltage which shall be increased
to the full test voltage as rapidly as is consistent
with its value being indicated by the measuring
instrument. The full test voltage shall be maintained
for 1 min. At the end of this period, the test voltage
shall be rapidly diminished to one-third of its full
value before switching off.

11.3 Tests at Site

The lift shall pass the following tests when carried
out at site and before it is put into normal service.
The necessary test weights and instruments shall
be provided by the lift manufacturer and the electric
power at the declared voltage (and frequency) required
for adjusting and testing shall be supplied by the
purchaser:

a) Test to determine that the insulation resistance
between power and control lines and earth is
not less than 0.5 megohms when measured
with a dc voltage of 500 V should be carried
out with the conductors so connected together
as to ensure that all parts of every circuit are
simultaneously tested.

NOTE — The dampness in a new building may prevent
a reading of 0.5 megohms from being obtained, in
which event the lift may be provisionally accepted
by the purchaser with an insulation resistance
of 0.25 megohms and re-tested before being finally
accepted.

b) Test to determine that the earthing of all conduit
switch castings and similar metal work is
continuous and of low resistance. Tests should
be made from all terminal points by means of
a substantial current to ensure that the
resistance of earth path is sufficiently low to
enable fuses or circuits to operate under faulty
conditions.

c) Test to determine that the motor, brake, control
equipment and door locking devices and limit
switches function correctly. Brake to be tested
to check whether it can sustain a car at rest

IS 14665 ( Part 3/Sec 1 ) : 2000

with contract load plus 25 percent of contract shall be made with ropes attached and all

load. electrical apparatus operative except the

overspeed switch on the governor,the sopping

d) Test to determine that the lift car raises and distance of the Hft car is the actual slide as

lowers rated load. observed f.rom the marking on guides.

e) Tests to determine that the lift car at least NOTE — The safety gear of a lift having an ac motor
achieves the contract speed- driven machine may be tested by manually tripping

the governor where the speed attained by a loaded lift

f) Tests to determine that the safety gear stops car descending, with brake released, is insufficient to
the lift car with rated load. Overspeed tests operate the governor.

As in the Original Standard, this Page is Intentionally Left Blank

IS 14665 ( Part 3/Sec 2 ) : 2000

Indian Standard
ELECTRIC TRACTION LIFTS

PART 3 SAFETY RULES
Section 2 Service Lifts

1 SCOPE

1.1 This standard ( Part 3 /Sec 2 ) prescribes the
constructional and safety requirements and the methods
of test for electric service lift.

1.2 This standard does not apply to platform and
motor vehicle lifts, amusement devices, skip hoists,
conveyors or similar apparatus used for raising, piling
or tiring.

2 REFERENCES

The following standards are necessary adjuncts to
this standard:

IS No.
401 : 1982

2365 : 1977

3109(Partl):
1982

12360:1988

14665

(Part 2/Sec 1
and 2) : 2000

(Part 4/
Sec 3) : 2000

(Part 4/
Sec 4) : 2000

Title

Code of practice forpreservation
of timber ( third revision )

Steel wire suspension ropes for
lifts, elevators and hoists
{first revision )

Short link chain, Grade M (4) :
Part 1 Non-calibrated load
chain for lifting purposes
( second revision )

Voltage bands for electrical
installations including preferred
voltages and frequency

Electric traction lifts:

Part 2 Code of practice for
installation, maintenance and
operation, Section 1 Passenger
and goods lifts; Section 2
Service lifts

Part 4 Components, Section 3
Lift carframe, car, counterweight
and suspension

Part 4 Components, Section 4
Lift safety gears and governors

3 TERMINOLOGY

3.1 For the purpose of this standard, the definitions
given in IS 14665 ( Part 2/Sec 1) and the following
definitions shall apply.

3.1.1 Service Lift ( Dumb-Waiter )

A lift with a car which moves in guides in a substantially
vertical direction; has net floor area, total inside height,
whether or not provided with fixed or removable shelves,
and capacity not exceeding 1 m 2 , 1.25 m and 250 kg
respectively; and is exclusively used for carrying
materials and not any person.

4 MATERIALS

4.1 All materials, fittings, appliances, etc, used in lift
installation shall conform to the relevant Indian
Standards wherever these exist. The materials for which
Indian Standards do not exist shall be approved by a
competent authority.

4.1.1 Indian Standards published so far forborne of
the materials and equipment used in the lift are as
given in Annex A.

5 FACTOR OF SAFETY

The requirements of Section 1 of this standard shall
apply.

6 GUIDES

The requirements of Section 1 of this standard shall
apply except that angle section guide rails may also
be used and the requirements of IS 14665 ( Part 4/
Sec 4 ) shall apply only when safety gear is used.

7 BUFFERS

Spring, rubber or timber buffers shall be used. Timber
shall be seasoned and treated in accordance with
IS 401.

8 LIFT CAR

8.1 The service lift car shall be made of wood or metal,
reinforced at the point of suspension. The material
used shall be of such strength and stiffness that it
withstands the contract load. Two pairs of renewable
guide shoes shall be provided.

8.2 Any removable shelves shall be so retained that
they are not displaced by the movement of the car.

8.3 Car constructed with openings on opposite sides
shall be provided with some form of protection to
prevent the goods from projecting outside the car.
Where gates are used, they shall have pickets spaced
with centres not more than 125 mm apart.

IS 14665 ( Part 3/Sec 2 ) : 2000

8.4 Where safety gear is provided, steel car frame of
sufficient rigidity to withstand the operation of the
safety gear shall be provided.

9 STRUCTURAL STRENGTH AND LOADING

9.1 Rated Load and Net Inside Car Area Measurements

Driving machine, car and counterweight, suspension
means, overhead beams and supports, buffers and
buffer supports, guides and brackets and all other
members subjected to load during operation shall be
designed on the basis of rated load calculated as follows:

L = 250^ J

where

L = rated load in kg, and

A = net inside area in m 1 .

The rated load shall be not more than 2S0 kg and the
net inside platform area shall be not more than 1 m 2 .

10 LOAD PLATE

A metal plate giving the rated load in not less than 6
mm high letters and figures shall be fastened in a
conspicuous place in the car..

11 COUNTERWEIGHT

11.1 The counterweight shall be of metal.

11.2 The counterweight consisting of sections and
without frame shall have not less than two suspension
rods extending throughout the counterweight. The
nuts on the suspension rods shall be retained by split
pins, concrete in metallic frame or equivalent positive
means.

12 SAFETY GEAR

12.1 A safety gear shall be provided for the car and
counterweight of the service lift working over an
occupied space or corridor, where the bottom of the
pit cannot support the impact load of the freely falling
loaded car or counterweight.

12.2 The safety gear may be of the instantaneous
type operated by| an independent steel wire rope
running over an independent pulley at the top of die
lift well; governor operation and switch to cut the
control circuit is hot required.

13 MEANS OF SUSPENSION AND FASTENINGS

13.1 The car and counterweight shall be suspended
by one or more steel wire suspension ropes conforming
to IS 2365 or silent type roller, block or multiple link
chains [ see also IS 3 109 ( Part 1 ) ].

13.2 All the ropes and chains anchored to a winding
drum shall have not less than one turn [see also
IS 3109 ( Part 1 ) ] on the drum when the car or
counterweight has reached the extreme limit of its
overtravel.

13.3 The factor of safety of the suspension means,
based on the static load of the car with structural
capacity load or of the counterweight, shall be not
less than:

4.5 + 1.4 f for ropes, and

5.6+1.75 K for chains.

where

Fisthe speed of the rope or chain in m/s.

13.3.1 For the purpose of this standard, the factor of
safety is given by:

F * n x k
W

where

F = nominal breaking strength of the rope or chain;

» = number of separate suspension ropes or chains
under load;

k = roping factor, that is, 1 for 1 : 1 roping, 2
for 2 : 1 roping and 3 for 3 : 1 roping; and

W = load on the car rope or chain when the car is
stationary and loaded to the structural
capacity load of the service lift.

13.4 No car or counterweight rope shall be repaired
or lengthened by splicing.

13.5 The winding drum ends of the car and
counterweight ropes shall be secured by clamps on
the inside of the drum.

13.6 The car and counterweight ends of the suspension
ropes shall be fastened by spliced return loops, clipped
return loops or individual tapered babbitted sockets.
Loops shall not bear directly on their fixings, but shall
be lined with proper thimble eyes or equal protection.

13.7 In all the cases the fastenings shall be capable
of sustaining a load not less than the ultimate strength
of the suspension ropes based on a factor of safety
of 80 percent of the specified factor of safety for
suspension ropes.

13.8 Means shall be provided to equalize the load on
the individual suspension ropes or chains.

13.9 Tensioning devices for compensation ropes,
safety ropes and the like shall be protected against
damage due to falling objects.

IS 14665 ( Part 3/Sec 2 ) : 2000

14 SHEAVES AND PULLEYS

The requirements of IS 14665 ( Part 4/Sec 3 ) shall
apply.

15 SHAFT FILLETS AND KEYS

The requirements of IS 14665 ( Part 4/Sec 3 ) shall
apply.

16 DRIVING MACHINE

16.1 The driving machine shall be of either of the
following types:

a) Drum type, and

b) Traction type.

16.2 The driving machine and sheaves shall be designed
with a factor of safety, based on the static load
( the structural capacity load plus the weight of the
car, ropes, counterweight, etc ), of not less than

a) 6 for steel, and

b) 9 for cast iron and other materials.

16.3 The driving machine shall have electrically released
brake applied automatically by springs in compression
or by gravity when the power is removed from the
motor.

17 LANDING DOORS

All landing openings in the lift well enclosure shall
be protected by doors, shutters or close picket type
collapsible gates.

1 8 LOCKING DEVICES FOR LANDING DOORS

Every landing door, shutter or gate shall be equipped
with an electromechanical lock which shall prevent
the lift from moving whilst any landing door, shutter
or gate is open.

19 CONTROLLERS AND OPERATING DEVICES

19.1 A manually operated mains-disconnecting switch
shall be installed in the main circuit cables of electric
driving machine. This switch shall be visible readily
accessible from the machine.

19.2 When metal-to-metal contacts are used in the
controller switch for opening the main circuit or for
stopping the driving machine, at least two independent
current breaks shall be incorporated in the design. In
the event of an earth fault or with any door open, the
lift shall not work.

19.3 Operation of a spring or springs in tension or
the completion of anotherfilectric circuit shall not be
depended upon to break the circuit to stop the lift at
terminal landings.

19.4 An interruption of the electrical circuit shall
stop or prevent the movement of the car.

19.5 When the driving machine is operated by a
polyphase ac motor, it shall be protected against phase
reversal or failure.

19.6 No control system shall be used which depends
on the completion or maintenance of an electrical circuit
for the interruption of the power supply and the
application of the electro-mechanical brakes when the
lift car reaches the terminal floors.

19.7 The control circuits shall be fused or otherwise
protection against faults or overloads, independently
of the main circuit.

19.8 The voltage of any controller-operating circuit
shall not exceed the low voltage as defined in IS 1 2360.
The control circuits shall be suitably protected
independently of the main circuit and they shall be
so arranged that an earth fault or open circuit shall
not create an unsafe condition.

19.9 Controller operate by hand ropes, levers or similar
devices shall not be permitted.

20 TERMINAL STOPPING AND FINAL LIMIT
SWITCHES

20.1 A device shall be provided to remove power
automatically from the motor and brake at the top and
bottom terminals independently of the operation of
the normal operating device. This device may be located
in the machine room in the car or in the lift well.

20.2 When the lift is provided with drum type driving
machine, it shall also have stopping limit switch operated
by the machine.

21 TESTING

The requirements of Section 1 of this standard shall
apply except the test specified in 1 1.3 ( f) of Section 1 .

22 GENERAL INFORMATION TO BE GIVEN
WITH ENQUIRY AND ORDER

When enquiring for and ordering an electric service
lift in accordance with this standard, the particulars
given below shall be supplied:

1) Type of lift ( in this case, electric service lift);

2) Number of lifts required;

3) Load to be carried in kg;

4) Rated speed in m/s;

5) Travel in m;

6) Number of floors and entrances to be served;

IS 14665 ( Part 3/Sec 2 ) : 2000

7) Names of floors served;

8) Method of control;

9) Position of machine room;

10) Size of lift well;

11) Positionof counterweight;

12) Size of car platform;

13) Construction, design and finish of car body-
work;

14) Particulars of car entrances;

15) Particulars of landing entrances;

16) Particulars of electric power supply, namely :

a) wattage,

b) voltage,

c) whether ac or dc,

d) number of phases,

e) frequency in Hz, and

f) type of wiring system;

17) Whether neutral wire is available for control
circuits;

18) Particulars of electric supply for lighting,
namely;

a) voltage,

b) whether ac or dc, and

c) frequency in Hz;

19) Whether the premises are subject to Lifts
Act/Rules;

20) Proposed date for commencement on site;

21) Proposed date for completion;

22) Particulars of additional items, for example,
safety items, required; and

23) Whether booklet giving complete details of
maintenance schedule and circuit diagram is
required.

NOTE — The following items are usually excluded
from the lift contract:

a) Builder's work, such as cutting away and making
good;

b) Lift well enclosure ( landing doors are usually
included in the contract).

c) Overhead beams or other steel work, or the
drilling of any steel work;

d) Scaffolding;

e) Temporary guarding of lift well:

Power and lighting cables to lift machine
room and lighting cables to halfway point in
lift well;

g) Main switches and fuses or circuit breakers
in machine rooms, and main switches and fuses
for isolating main cables to macliine]rooms; and

h) Surveyor's or other professional fees.

10

IS 14665(Part3/Sec2):2000

ANNEX A

(Clause 4.1.1 )

INDIAN STANDARDS FOR MATERIALS USED IN ELECTRIC SERVICE LIFT

A-l Indian Standards published so far for some of
the materials used in the electric service lift are as
follows :

Material Indian Standard

Thimbles for IS 23 15 : 1978 Thimbles for wire
wire ropes ropes (first revision )

Grips for wire IS 2361 : 1994 Bulldog grips
ropes ( second revision )

Steel wire IS 2365 : 1977 Steel wire suspen-
ropes sion ropes for lifts, elevators and

hoists (first revision )

Material

Sockets for
wire ropes

Worm gears

Capping metal
for wire ropes

Steel eyebolts

Indian Standard

forged

IS 2485: 1979 Drop
sockets for wire ropes for general
engineering purposes ( first
revision )

15 3734:1983 Dimensions for
worm gearing (first revision )

IS 3937: 1974 Recommendations
for socketing of wire ropes
(first revision )

IS4190 : 1984 Eyebolts with
collars (first revision )

11

IS 14665 ( Part 3/Sec 1 & 2 ) : 2000

ANNEX B
COMMITTEE COMPOSITION

Lifts and Escalators Sectional Committee, ET 25

Chairman

Shri D. H. Path.

Maharashtra Public Work Department

Members

President

President

Shri S. V. Kamat

Shri P. M. Tipnjs ( Alternate )

SfHRI S. N. Sareen

Shri P. Gujral ( Alternate )

Shri M. I. Khumri

Shri K. Krishnamurthy Naik

Shri M. S. Basavaraju ( Alternate )

Shri S. Kulasekharan

Shri N. Rangaswamy ( Alternate )

Shri D. K. Sen

Shri S. K. Mitra ( Alternate )

Shri M, S. Bhattacharjee

Shri Sanatan Chatterjee ( Alternate )

CE ( E ) I

SE ( E ) DCEVI ( Alternate )

Shri S. K. Kaila

Shri B. K. Behl ( Alternate )

Shri I. Q. Najam

Shri V. Subramanian

Shri A. K. Rai ( Alternate )

Shri P. K. Banka

Shri Jagat Mohan ( Alternate )

Shri P. Gurumoorthy

Shri J. Sivaraman ( Alternate )

Shri K. L. Grover

Shri Avinash Aggarwal ( Alternate )

Shri A. S. Herwadkar

Dr G. H. Malkani/Shri S. P. Rao ( Alternate )

Shri K. M. Bhatia,
Director ( Elec Tech )

Representing
Practicing Engineers, Architects and Town Planners, Mumbai
Builders Association of India, Mumbai
Bharat Bijlee Ltd, Mumbai

Central Electricity Authority, New Delhi

Government of Gujarat ( IW ), Energy and Petrochemical
Department, Gandhinagar

Chief Electrical Inspectorate (Karnataka), Bangalore

Chief Electrical Inspector ( Tamil Nadu ), Chennai

Chief Electrical Inspector (West Bengal ), Calcutta

Central Mechanical Engineering Research Institute. Durgapur

Central Public Works Department, New Delhi

Ministry of Defence, New Delhi

Maharashtra Public Works Department, Pune
Directorate General of Supplies and Disposals, New Delhi

ECE Industries Ltd, Ghaziabad

Kone Elevator India Ltd, Chennai

Office of the Labour Commissioner, Delhi Administration,
New Delhi

OTIS Elevator Co ( India ) Ltd, Mumbai

Director General, BIS ( Ex-officio Member )

Member-Secretary

Shri G. Bauu
Deputy Director ( Elec Tech ), BIS

12

( Continued from second cover )

New IS Series Superseding IS

Section 6 Lift doors and locking devices 7759:1975 Lift door locking devices and contacts;
and contacts and

11633: 1986 Lift doors

Section 7 Lift machines and brakes 10913 : 1984 Brakes for electric passenger and goods lifts

Section 8 Lift wire ropes —

Section 9 Controller and operating devices —

for lifts
Part 5 Inspection manual —

This standard IS 14665 ( Part 3/Sec 1 and 2 ) will supersede:

IS 4666 : 1980 Electric passenger and goods lifts (first revision ); and

IS 6383 : 1971 Electric service lifts.

Details about installation, maintenance and operation of electric traction lifts, passenger and service lifts are
covered in IS 14665 ( Part 2/Sec I and 2 ). This standard ( Part 3/Sec 1 ) on passenger and goods lifts is intended to
cover constructional and safety aspects of these types of lifts.

Section 2 of this standard lays down the specific requirements of service lifts; and for various other requirements
and test methods, reference have been made to Section 1 of this standard, which is a necessary adjunct to this
standard.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with
IS 2 : 1960 'Rules for rounding off numerical values (revised)'. The number of significant places retained in the
rounded off value should be the same as that of the specified value in this standard.

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards A ct, 1 986 to promote harmonious
development of the activities of standardization, marking and quality certification of goods and attending to
connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications maybe reproduced in any form without
the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the
standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to
copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed
periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are
needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards
should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue
of 'BIS Handbook' and 'Standards : Monthly Additions'.

This Indian Standard has been developed from Doc : No. ET 25 ( 4098 ).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDS
Headquarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 1 10002 Telegrams: Manaksanstha

Telephones : 323 01 31, 323 94 02, 323 33 75 ( Common to

all offices )

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CALCUTTA 700054 \ 337 86 26, 337 86 62

Northern : SCO 335-336, Sector 34-A, CHANDIGARH 160022 f 60 38 43

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235 15 19, 235 23 15

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